问题

Have you realized the difficulty we have ____ the problem?

A:worked out
B:to work out
C:work out
D:working out

正确答案是：

标签： out , realized , work

同类题型

Mrs. Brown, I don’t think we can get there on time by bike. — You mean it’s ___________ for us to take a taxi?

Is this_____ computer game?— Yes, _____ is. It’s _____ computer game.

They have T-shirts _______ green and black for only $13 _______ the shop. [ ]

My father is busy _____ the moment. [ ]

I hear that Lily’s brother is a worker here.—Look, the man _________ is working over there is her brother.